﻿// Copyright (c) 2011 AlphaSierraPapa for the SharpDevelop Team
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
// software and associated documentation files (the "Software"), to deal in the Software
// without restriction, including without limitation the rights to use, copy, modify, merge,
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
// to whom the Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all copies or
// substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.

using System.Linq;
using System.Threading;
using ICSharpCode.Decompiler.TypeSystem;
using ICSharpCode.ILSpy.Properties;

namespace ICSharpCode.ILSpy.TreeNodes
{
    [ExportContextMenuEntry(Header = nameof(Resources.SearchMSDN), Icon = "Images/SearchMsdn.png", Order = 9999)]
    internal sealed class SearchMsdnContextMenuEntry : IContextMenuEntry
    {
        private static string msdnAddress = "http://msdn.microsoft.com/{1}/library/{0}";

        public bool IsVisible(TextViewContext context)
        {
            if (context.SelectedTreeNodes == null)
                return false;

            return context.SelectedTreeNodes.All(
                n => n is NamespaceTreeNode
                || n is TypeTreeNode
                || n is EventTreeNode
                || n is FieldTreeNode
                || n is PropertyTreeNode
                || n is MethodTreeNode);
        }

        public bool IsEnabled(TextViewContext context)
        {
            if (context.SelectedTreeNodes == null)
                return false;

            foreach (var node in context.SelectedTreeNodes)
            {
                if (node is TypeTreeNode typeNode && !typeNode.IsPublicAPI)
                    return false;

                if (node is EventTreeNode eventNode && (!eventNode.IsPublicAPI || !IsAccessible(eventNode.EventDefinition)))
                    return false;

                if (node is FieldTreeNode fieldNode && (!fieldNode.IsPublicAPI || !IsAccessible(fieldNode.FieldDefinition)))
                    return false;

                if (node is PropertyTreeNode propertyNode && (!propertyNode.IsPublicAPI || !IsAccessible(propertyNode.PropertyDefinition)))
                    return false;

                if (node is MethodTreeNode methodNode && (!methodNode.IsPublicAPI || !IsAccessible(methodNode.MethodDefinition)))
                    return false;

                if (node is NamespaceTreeNode namespaceNode && string.IsNullOrEmpty(namespaceNode.Name))
                    return false;
            }

            return true;
        }

        bool IsAccessible(IEntity entity)
        {
            if (entity.DeclaringTypeDefinition == null)
                return false;
            switch (entity.DeclaringTypeDefinition.Accessibility)
            {
                case Accessibility.Public:
                case Accessibility.Protected:
                case Accessibility.ProtectedOrInternal:
                    return true;
                default:
                    return false;
            }
        }

        public void Execute(TextViewContext context)
        {
            if (context.SelectedTreeNodes != null)
            {
                foreach (ILSpyTreeNode node in context.SelectedTreeNodes)
                {
                    SearchMsdn(node);
                }
            }
        }

        public static void SearchMsdn(ILSpyTreeNode node)
        {
            var address = string.Empty;

            var namespaceNode = node as NamespaceTreeNode;
            if (namespaceNode != null)
                address = string.Format(msdnAddress, namespaceNode.Name, Thread.CurrentThread.CurrentUICulture.Name);

            if (node is IMemberTreeNode memberNode)
            {
                var member = memberNode.Member;
                var memberName = string.Empty;

                if (member.DeclaringType == null)
                    memberName = member.FullName;
                else
                    memberName = string.Format("{0}.{1}", member.DeclaringType.FullName, member.Name);

                address = string.Format(msdnAddress, memberName, Thread.CurrentThread.CurrentUICulture.Name);
            }

            address = address.ToLower();
            if (!string.IsNullOrEmpty(address))
                MainWindow.OpenLink(address);
        }
    }
}